Overview
The MC74LVXC3245DWRG is a 24-pin dual-supply, octal configurable voltage interface transceiver produced by onsemi. It is particularly suited for PCMCIA and other real-time configurable I/O applications. The device features two separate power supply pins: VCCA for the A port, which operates at 3.0V, and VCCB for the B port, which can operate between 3.0V and 5.0V. The B port's voltage level is configurable based on the VCCB supply level, allowing for seamless interface between 3V and 3V/5V buses.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCCA, VCCB Supply Voltage | 2.3 | - | 3.6 (VCCA), 5.5 (VCCB) | V |
| VI Input Voltage (OE, T/R) | 0 | - | VCCA + 0.5 | V |
| VI/O Input/Output Voltage (An, Bn) | 0 | - | VCCA + 0.5 (An), VCCB + 0.5 (Bn) | V |
| IO DC Output Source/Sink Current | - | - | ±50 | mA |
| tPHL, tPLH Propagation Delay (A to B, B to A) | 1.0 | - | 9.0 (A to B), 8.5 (B to A) | ns |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Type | - | - | SOIC-24, TSSOP-24 | - |
Key Features
- Bidirectional interface between 3V and 3V/5V buses
- Control inputs compatible with TTL level
- Outputs source/sink up to 24mA
- Guaranteed simultaneous switching noise level and dynamic threshold performance
- Available in SOIC and TSSOP packages
- Flexible VCCB operating range
- Allows B port and VCCB to float simultaneously when OE is High
- Functionally compatible with the 74 Series 245
- Pb-Free packages are available and RoHS compliant
Applications
The MC74LVXC3245DWRG is particularly well-suited for PCMCIA and other real-time configurable I/O applications. It is ideal for use in systems where data needs to be buffered between a 3V host system and card slots that may operate at either 3V or 5V. This includes applications in portable devices, embedded systems, and any scenario requiring voltage level translation between different bus voltages.
Q & A
- What is the primary function of the MC74LVXC3245DWRG?
The MC74LVXC3245DWRG is a dual-supply, octal configurable voltage interface transceiver that provides a bidirectional interface between 3V and 3V/5V buses.
- What are the operating voltage ranges for VCCA and VCCB?
VCCA operates at 2.3V to 3.6V, and VCCB operates at 2.3V to 5.5V.
- What is the significance of the OE and T/R inputs?
The OE (Output Enable) input controls the output state, and the T/R (Transmit/Receive) input determines the direction of data flow between the A and B ports.
- What are the package options available for this component?
The MC74LVXC3245DWRG is available in SOIC-24 and TSSOP-24 packages.
- Is the MC74LVXC3245DWRG Pb-Free and RoHS compliant?
- What is the maximum output current sourcing/sinking capability of the device?
The device can source/sink up to 24mA.
- What is the propagation delay for data transmission between the A and B ports?
The propagation delay ranges from 1.0ns to 9.0ns depending on the direction of data flow.
- Can the B port and VCCB float simultaneously when OE is High?
- What are some common applications for the MC74LVXC3245DWRG?
- Is the device compatible with TTL level control inputs?
